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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Histogram is an object that aggregates statistics, and can summarize them in | 5 // Histogram is an object that aggregates statistics, and can summarize them in |
6 // various forms, including ASCII graphical, HTML, and numerically (as a | 6 // various forms, including ASCII graphical, HTML, and numerically (as a |
7 // vector of numbers corresponding to each of the aggregating buckets). | 7 // vector of numbers corresponding to each of the aggregating buckets). |
8 // See header file for details and examples. | 8 // See header file for details and examples. |
9 | 9 |
10 #include "base/metrics/histogram.h" | 10 #include "base/metrics/histogram.h" |
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362 if (!ValidateRangeChecksum(*histogram, range_checksum)) { | 362 if (!ValidateRangeChecksum(*histogram, range_checksum)) { |
363 // The serialized histogram might be corrupted. | 363 // The serialized histogram might be corrupted. |
364 return NULL; | 364 return NULL; |
365 } | 365 } |
366 return histogram; | 366 return histogram; |
367 } | 367 } |
368 | 368 |
369 scoped_ptr<SampleVector> Histogram::SnapshotSampleVector() const { | 369 scoped_ptr<SampleVector> Histogram::SnapshotSampleVector() const { |
370 scoped_ptr<SampleVector> samples(new SampleVector(bucket_ranges())); | 370 scoped_ptr<SampleVector> samples(new SampleVector(bucket_ranges())); |
371 samples->Add(*samples_); | 371 samples->Add(*samples_); |
372 return samples; | 372 return samples.Pass(); |
373 } | 373 } |
374 | 374 |
375 void Histogram::WriteAsciiImpl(bool graph_it, | 375 void Histogram::WriteAsciiImpl(bool graph_it, |
376 const string& newline, | 376 const string& newline, |
377 string* output) const { | 377 string* output) const { |
378 // Get local (stack) copies of all effectively volatile class data so that we | 378 // Get local (stack) copies of all effectively volatile class data so that we |
379 // are consistent across our output activities. | 379 // are consistent across our output activities. |
380 scoped_ptr<SampleVector> snapshot = SnapshotSampleVector(); | 380 scoped_ptr<SampleVector> snapshot = SnapshotSampleVector(); |
381 Count sample_count = snapshot->TotalCount(); | 381 Count sample_count = snapshot->TotalCount(); |
382 | 382 |
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837 | 837 |
838 BucketRanges* bucket_ranges = new BucketRanges(ranges.size()); | 838 BucketRanges* bucket_ranges = new BucketRanges(ranges.size()); |
839 for (size_t i = 0; i < ranges.size(); i++) { | 839 for (size_t i = 0; i < ranges.size(); i++) { |
840 bucket_ranges->set_range(i, ranges[i]); | 840 bucket_ranges->set_range(i, ranges[i]); |
841 } | 841 } |
842 bucket_ranges->ResetChecksum(); | 842 bucket_ranges->ResetChecksum(); |
843 return bucket_ranges; | 843 return bucket_ranges; |
844 } | 844 } |
845 | 845 |
846 } // namespace base | 846 } // namespace base |
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